The peroxidase activity and soluble protein content in the leaves of Aloe vera var. chinensis were assayed by spectrophotometric method. The results show that the peroxidase activity in the upper most and lower parts of leaves is comparatively high. Soluble protein content decreases from top to bottom leaves. The results of electrophoresis of soluble protein show that the patterns of upper leaves have more and darker bands than those of lower leaves.